SYSE.36:2 - Problem
A backend counts only the requests it receives. Failures at the user entry can disappear from its denominator. An HTTP success response can accompany the wrong application result. Metrics collected without version or task attribution can mix unlike uses and conceal the changed behavior.
A displayed target has a different defect when nobody agrees what it protects or what to do when it is missed. The measurement then becomes a reporting number, while engineering priorities remain disconnected from user experience.